oj.uz

Submission #1031747

# Submission time Handle Problem Language Result Execution time Memory
1031747 2024-07-23T06:30:23 Z 김은성(#10960) Furniture (JOI20_furniture) C++17
0 / 100
 1 ms 604 KB 
#include <bits/stdc++.h>
using namespace std;
bool ch[1009][1009], ch2[1009][1009];
int n, m, cnt[2019];
void update(int r, int c){
    if(r<=0 || r>n || c<=0 || c>m || !ch[r][c])
        return;
    ch[r][c] = (ch[r-1][c] || ch[r][c-1]) && ch[r][c];
    if(ch[r][c])
        return;
    update(r+1, c);
    update(r, c+1);
}
void update2(int r, int c){
    if(r<=0 || r>n || c<=0 || c>m || !ch2[r][c])
        return;
    cnt[r+c] -= (ch[r][c] && ch2[r][c]);
    ch2[r][c] = (ch2[r+1][c] || ch2[r][c+1]) && ch2[r][c];
    cnt[r+c] += (ch[r][c] && ch2[r][c]);
    if(ch2[r][c])
        return;
    update2(r-1, c);
    update2(r, c-1);
}
int main(){
    int i, j, r, c;
    scanf("%d %d", &n,&m);
    ch[0][1] = ch[1][0] = ch[n+1][m] = ch[n][m+1] = 1;
    ch2[0][1] = ch2[1][0] = ch2[n+1][m] = ch2[n][m+1] = 1;
    for(i=1; i<=n; i++){
        for(j=1; j<=m; j++){
            int val;
            scanf("%d", &val);
            if(!val){
                ch[i][j] = ch2[i][j] = 1;
            }
        }
    }
    for(i=1; i<=n; i++){
        for(j=1; j<=m; j++){
            ch[i][j] = ((ch[i-1][j] || ch[i][j-1]) && ch[i][j]);
        }
    }
    for(i=n; i>=1; i--){
        for(j=m; j>=1; j--){
            ch2[i][j] = ((ch2[i+1][j] || ch2[i][j+1]) && ch2[i][j]);
            if(ch[i][j] && ch2[i][j]){
                cnt[i+j]++;
            }
        }
    }
    int q;
    scanf("%d", &q);
    while(q--){
        scanf("%d %d", &r, &c);
        if(!(ch[r][c] && ch2[r][c]) || cnt[r+c] > 1){
            printf("1\n");
            cnt[r+c] -= (ch[r][c] && ch2[r][c]);
            ch[r][c] = ch2[r][c] = 0;
            update(r+1, c), update(r, c+1);
            update2(r-1, c), update2(r, c-1);
        }
        else
            printf("0\n");
    }
    return 0;
}

Compilation message

furniture.cpp: In function 'int main()':
furniture.cpp:27:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     scanf("%d %d", &n,&m);
      |     ~~~~~^~~~~~~~~~~~~~~~
furniture.cpp:33:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |             scanf("%d", &val);
      |             ~~~~~^~~~~~~~~~~~
furniture.cpp:53:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
furniture.cpp:55:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   55 |         scanf("%d %d", &r, &c);
      |         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
0.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Incorrect 1 ms 604 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Incorrect 1 ms 604 KB Output isn't correct
3 Halted 0 ms 0 KB -